690688122 has 32 divisors (see below), whose sum is σ = 1427725824. Its totient is φ = 222523200.

The previous prime is 690688111. The next prime is 690688123. The reversal of 690688122 is 221886096.

It is not an unprimeable number, because it can be changed into a prime (690688123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188088 + ... + 191724.

It is an arithmetic number, because the mean of its divisors is an integer number (44616432).

Almost surely, 2^690688122 is an apocalyptic number.

690688122 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

690688122 is an abundant number, since it is smaller than the sum of its proper divisors (737037702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690688122 is a wasteful number, since it uses less digits than its factorization.

690688122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4694.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 690688122 is about 26280.9459875401. The cubic root of 690688122 is about 883.9492448150.

The spelling of 690688122 in words is "six hundred ninety million, six hundred eighty-eight thousand, one hundred twenty-two".